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Home » Products » Pharmaceutical Intermediates » 2,2,6,6-tetramethylpiperidine-1-oxyl

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2,2,6,6-Tetramethyl-1-piperinedinyloxy commonly known as TEMPO, is a chemical compound used as a radical marker,as a structural probe, and as a mediator in controlled radical polymerization. This heterocyclic compound is a stable aminoxyl radical, it has applications in chemistry and biochemistry.
We have manufactured TEMPO for more than 15 years.
For more information, please contact us anytime.
Category Pharmaceutical intermediates
Annual capacity 100mTs
Stock information
Mass production, always have stock.
Basic Information
Synonyms 2,2,6,6-Tetramethyl-1-piperidinyloxy;
2,2,6,6-Tetramethylpiperidine 1-Oxyl Free Radical;


tempo,free redical;

2,2,6,6-Tetramethylpiperidine 1-oxide;





CAS number 2564-83-2
EINECS  219-888-8
Formula C9H18NO
Structure 2564-83-2
Molecular Weight 156.25
Melting Point 36-38 °C(lit.)
Flashing Point  154 °F
Boiling Point  193°C
Density  1 g/cm3
COA Information
Apperance Red Crystal
Purity min. 99.0%
Moisture max. 1.0%
Ash max. 0.1%
Safety Information
Hazard Codes   C,Xi
WGK Germanys  3
HazardClass 8
RIDADR  UN 3263 8/PG 2
HS Code  29333999
TEMPO(2,2,6,6-Tetramethylpiperidinooxy) is a stable radical prepared through the oxidation of 2,2,6,6-tetramethylpiperidine. TEMPO has a wide range of applications including use as a free radical scavenger, a reagent in organic synthe sis and as a structural probe in electron spin resonance spectroscopy. TEMPO can also be used as a mediator in free radical polymerization.
 In organic chemistry as a radical trap, 2,2,6,6-Tetramethylpiperidinooxy can be used as a catalyst and in polymerization mediation.